Bhai ab tere comprehension skills kharab hai toh mai kya karu? I said people don't like paying, didn't say they don't end up paying it. Kuch build karte hai toh current alternatives dekhte hai - how are people finding flatmates today? Either via personal referrals or social media (could be FB groups, twitter amplification, instagram stories, etc) which tells you one thing - its all free. The value they derive today via free channels is enough for them. Anything extra like - 'find your soulflatmate' via a Tinder like product but pay for it isn't needed, the market is pretty small to wait years before you can monetize it.
How much are you guessing the TAM would be?
A product like this would eventually become a listings marketplace to generate money and ends up becoming another Housing or 99Acres which it would never be able to beat so.